<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified">
  <xs:element name="image">
    <xs:complexType>
      <xs:complexContent>
        <xs:extension base="icaption">
          <xs:attribute name="file" use="required"/>
        </xs:extension>
      </xs:complexContent>
    </xs:complexType>
  </xs:element>
  <xs:complexType name="icaption">
    <xs:sequence>
      <xs:element ref="icaption"/>
    </xs:sequence>
  </xs:complexType>
  <xs:element name="icaption" type="xs:string"/>
</xs:schema>